keystone

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Related to keystones: keystone arch

key·stone

 (kē′stōn′)
n.
1. Architecture A wedge-shaped stone at the top of an arch, often larger or more ornamented than the other voussoirs. Also called headstone.
2. The central supporting element of a whole.

keystone

(ˈkiːˌstəʊn)
n
1. (Building) Also called: headstone or quoin the central stone at the top of an arch or the top stone of a dome or vault
2. something that is necessary to connect or support a number of other related things

key•stone

(ˈkiˌstoʊn)

n.
1. the wedge-shaped piece at the summit of an arch, regarded as holding the other pieces in place.
2. something on which associated things depend; foundation.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.keystone - a central cohesive source of support and stabilitykeystone - a central cohesive source of support and stability; "faith is his anchor"; "the keystone of campaign reform was the ban on soft money"; "he is the linchpin of this firm"
support - something providing immaterial assistance to a person or cause or interest; "the policy found little public support"; "his faith was all the support he needed"; "the team enjoyed the support of their fans"
2.keystone - the central building block at the top of an arch or vault
arch - (architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it
building block - a block of material used in construction work
coign, coigne, quoin - the keystone of an arch

keystone

noun basis, principle, core, crux, ground, source, spring, root, motive, cornerstone, lynchpin, mainspring, fundament, quoin the keystone of the government's economic policy
Translations

keystone

[ˈkiːstəʊn] N (Archit) → dovela f (fig) → piedra f angular

keystone

[ˈkiːstəʊn] n
[arch] → clé f de voûte
[policy, system, process] → clé f de voûte

keystone

[ˈkiːˌstəʊn] nchiave f di volta
References in classic literature ?
Zoned by those letters you saw the likeness of three Andes' summits; from one a flame; a tower on another; on the third a crowing cock; while arching over all was a segment of the partitioned zodiac, the signs all marked with their usual cabalistics, and the keystone sun entering the equinoctial point at Libra.
No one could suspect that those two hands had been engaged with others in drawing out from the social edifice the keystone of royalty.
thought Gringoire, staring at what she was gazing at; "'tis impossible that it can be that stone dwarf carved in the keystone of that arch, which thus absorbs her attention.